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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Adam Scott | 1.04 | 2021 | |
| 2 | Rafael Montero# | 1.10 | 2013 | |
| 2 | Manny Banuelos# | 1.10 | 2013 | |
| 4 | Tanner Peters | 1.15 | 2015 | |
| 5 | Denyi Reyes# | 1.16 | 2020 | |
| 6 | Asher Wojciechowski | 1.17 | 2021 | |
| 7 | C.J. Riefenhauser | 1.19 | 2013 | |
| 7 | Kevin McAvoy | 1.19 | 2018 | |
| 9 | Denyi Reyes# | 1.20 | 2021 | |
| 10 | Jake Stinnett | 1.22 | 2017 | |
| 11 | Erick Leal# | 1.23 | 2021 | |
| 12 | Gustavo Gomez | 1.25 | 2016 | |
| 12 | Gus Varland# | 1.25 | 2022 | |
| 14 | Nick Fraze# | 1.26 | 2022 | |
| 15 | Rylan Kaufman# | 1.28 | 2023 | |
| 15 | John Rooney# | 1.28 | 2022 | |
| 15 | Jose Taveras | 1.28 | 2020 | |
| 15 | David Goforth | 1.28 | 2013 | |
| 19 | Valente Bellozo# | 1.30 | 2024 | |
| 20 | Eduardo Rodriguez# | 1.31 | 2015 | |
| 20 | Jeff Ames | 1.31 | 2015 | |
| 22 | Matt Frisbee# | 1.32 | 2021 | |
| 22 | Jayson Aquino | 1.32 | 2015 | |
| 24 | Eduardo Rodriguez# | 1.33 | 2014 | |
| 25 | Adam Ottavino# | 1.35 | 2007 | |
| 25 | Matt Brazis | 1.35 | 2014 | |
| 25 | Gus Varland# | 1.35 | 2021 | |
| 28 | Michael Strong | 1.36 | 2015 | |
| 29 | Michael Fulmer# | 1.37 | 2015 | |
| 29 | Austin Cox# | 1.37 | 2021 | |
| 31 | Jeff Ames | 1.41 | 2016 | |
| 31 | Manaure Martinez | 1.41 | 2015 | |
| 33 | Dae-Eun Rhee | 1.42 | 2014 | |
| 33 | Tanner Peters | 1.42 | 2014 | |
| 35 | Timothy Shibuya | 1.44 | 2014 | |
| 35 | Dan Camarena# | 1.44 | 2017 | |
| 35 | Jayden Murray# | 1.44 | 2021 | |
| 38 | Jon Olsen# | 1.45 | 2022 | |
| 38 | Parker Markel | 1.45 | 2013 | |
| 38 | Seth Blair | 1.45 | 2013 | |
| 38 | Jordan Johnson | 1.45 | 2020 | |
| 38 | Manuel Espinoza# | 1.45 | 2024 | |
| 43 | Jonathan Dziedzic | 1.48 | 2015 | |
| 44 | Mike Ruff# | 1.49 | 2022 | |
| 44 | Brendon Little# | 1.49 | 2021 | |
| 44 | Parker Bridwell | 1.49 | 2015 | |
| 47 | Silfredo Garcia | 1.50 | 2015 | |
| 47 | Eric Jokisch# | 1.50 | 2013 | |
| 47 | Lucas Knowles# | 1.50 | 2023 | |
| 47 | Dallas Beeler | 1.50 | 2013 | |
| 51 | Jordan Johnson | 1.53 | 2018 | |
| 51 | Ian Oxnevad | 1.53 | 2018 | |
| 53 | Michael Fulmer# | 1.54 | 2014 | |
| 54 | Riley Davis# | 1.55 | 2023 | |
| 55 | Dallas Litscher | 1.56 | 2021 | |
| 56 | Chris Rodriguez# | 1.57 | 2020 | |
| 57 | Evan Fitterer# | 1.58 | 2023 | |
| 58 | Jordan Pries | 1.60 | 2013 | |
| 59 | Jorge Guzman# | 1.61 | 2021 | |
| 60 | Jeff Ames | 1.63 | 2014 | |
| 60 | Mason Radeke | 1.63 | 2017 | |
| 60 | Luis Diaz | 1.63 | 2014 | |
| 63 | Jack Leftwich# | 1.65 | 2023 | |
| 64 | Tyler Woessner# | 1.67 | 2024 | |
| 65 | Freicer Perez | 1.69 | 2018 | |
| 66 | Miguel Sulbaran | 1.74 | 2014 | |
| 67 | Silfredo Garcia | 1.77 | 2014 | |
| 68 | Blake Shouse | 1.83 | 2014 | |
| 69 | Jonathan Dziedzic | 1.89 | 2014 |
